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一、简介现代国防工业以及宇航方面总是向高速度和大体积发展,对材料的强度——重量比要求很高,为此近几年许多受力的重要结构件都采用高强度钢制造,其抗拉强度已可高达180～200公斤/毫米~2以上。但高强度钢的韧性会随其强度增高而下降,因此这种材料对缺口、氢脆以及应力腐蚀很敏感,尤其是氢脆性会使这类材料在其设计载荷能力以下即产生破坏。也就是说材料在受氢的情况下,在低于其屈服强度的应
I. INTRODUCTION Modern defense industry and aerospace always develop towards high speed and large volume, and have high requirements on the strength-weight ratio of materials. Therefore, in recent years, many important structural components subjected to stress are made of high-strength steel, Its tensile strength has been as high as 180 ~ 200 kg / mm ~ 2 above. However, the toughness of high-strength steels decreases as their strength increases. Therefore, this material is sensitive to notches, hydrogen embrittlement and stress corrosion. Hydrogen embrittlement, in particular, can cause such materials to break below their designed load capacity. That is to say the material should be below its yield strength in the presence of hydrogen